海洋测绘2018，Vol.38Issue(1)：27-30,49,5.DOI:10.3969/j.issn.1671-3044.2018.01.007
非差非组合与组合模型定位性能对比及并行设计
Performance Comparison and Parallel Computing Between Ionosphere-free Combined and Uncombined Precise Point Positioning
摘要
Abstract
In order to analyze the difference of traditional ionosphere-free precise point positioning (PPP) model and uncombined PPP model,observations are used to compare the static positioning performance whit respect to positioning accuracy between two PPP models.The parallel computing model of two PPP model is further designed and implemented to effectively improve the computation efficiency of un-differential processing strategy for data of huge GNSS network.The experimental results of large data test show that the positioning accuracy for both combined and uncombined PPP model is not significantly different.Compare with the IGS daily products,the average deviation of daily static positioning accuracy of uncombined PPP is (4.2,2.8,4.2) mm,and the average deviation of combined PPP is (4.0,2.8,4.0) mm.However,the calculating time of uncombined PPP model is about 1.4 times than the combined PPP model.In the multi-core computing environment,the efficiency of two PPP parallel computing models is improved higher than the traditional serial computing models.The results show that compared to the single core serial processing,the computational efficiency of dual-core parallel and quad-core parallel are improved approximately 40％ and 62％ respectively.关键词
非差无电离层组合/非差非组合/定位精度/解算效率/并行计算Key words
ionosphere-free combined precise point positioning/uncombined precise point positioning/positioning accuracy/positioning efficiency/parallel computing分类
天文与地球科学引用本文复制引用
崔阳,吕志平,翟树峰,孙大双,王宁..非差非组合与组合模型定位性能对比及并行设计[J].海洋测绘,2018,38(1):27-30,49,5.基金项目
国家自然科学基金(41674019) （41674019）
国家重点研发计划(2016YFB0501701) （2016YFB0501701）
地理信息工程国家重点实验室开放基金(SKLGIE2014-M-1-5). （SKLGIE2014-M-1-5）
